题目内容:
在窗体上画一个名称为Text1的文本框,要求文本框只能接收大写字母的输入。以下能实现该操作的事件过程是( )。
A.Private Sub Text1_KeyPress(KeyAscii As Integer) If KeyAscii < 65 Or KeyAscii > 90 Then
MsgBox "请输入大写字母"
KeyAscii = 0
End If
End Sub
B.Private Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)
If KeyCode < 65 Or KeyCode > 90 Then
MsgBox "请输入大写字母"
KeyCode = 0
End If
End Sub
C.Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Asc(Text1.Text) < 65 Or Asc(Text1.Text) > 90 Then
MsgBox "请输入大写字母"
End If
End Sub
D.Private Sub Text1_Change()
If Asc(Text1.Text) > 64 And Asc(Text1.Text) < 91 Then
MsgBox "请输入大写字母"
End If
End Sub
参考答案:
答案解析: